Ask wifi-U: Why Wi-Fi Is Slower Than Ethernet

Your Wi-Fi connection may report an impressive link speed, but that doesn’t mean you’ll see the same speed in a real-world speed test.

In this Ask wifi-U video, we break down the key reasons:
🔹 Ethernet has a dedicated connection
🔹 Wi-Fi shares the wireless medium with other devices
🔹 PHY rate ≠ actual throughput
🔹 Protocol overhead, acknowledgments, retransmissions, and management traffic all consume airtime
🔹 Distance, interference, and RF conditions can cause Wi-Fi to adapt to slower modulation rates

The bottom line?
👉 Wi-Fi isn’t simply “slower Ethernet.” It’s a completely different type of network technology—and understanding how it works is essential for designing and troubleshooting high-performance wireless networks.

Want to go beyond the basics and build real Wi-Fi expertise?

Join wifi-U’s remote trainings and learn how to design, deploy, troubleshoot, and optimize Wi-Fi with confidence.

👉 Explore our remote training courses: https://learn.wifi-u.com/collections/products